CD274 and cancer: Among studies reporting the PFS, the one-year PFS average(range) was 38.5 % (24.8–50%) and 27.5% (0–100%) for cancer patients with low and high values of PD-L1, respectively; while the two-year PFS average(range) was 27.5% (0–100%) and 9.0% (0–21.6%), respectively (Table S1).